[DRBD-user] Fw: Another potential bug- Copying on a mounted drbd device while syn_ed cause to hung

Francis I. Malolot francis_m at proware.com.tw
Mon Oct 24 04:24:25 CEST 2005

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Lars,

I had seen the fixed of the deadlock on our SMP box.
sync_ed is now working painlessly,


thanks,
francism
x318



> From: Lars Ellenberg <Lars.Ellenberg at linbit.com>
> Date: 2005年10月21日 下午11時41分54秒
> To: "Francis I. Malolot" <francis_m at proware.com.tw>
> Cc: david_huang <david_huang at proware.com.tw>
> Subject: Re: Another potential bug-  Copying on a mounted drbd
> device while  syn_ed cause to hung
>
>
> / 2005-10-21 18:13:33 +0800
> \ Francis I. Malolot:
>
>> Hi Lars,
>>
>> I had encounter another interesting (potential)issue.
>> Here's the situation.While in sync_ed. I
>> had mounted the primary drbd device.and start copy
>> a file accross the network.after several seconds
>> primary device hung.after reboot drdb0 start to resync again
>> but again again if  i copy files it will hung.
>>
>> Now, Is it safe to mount drbd device while sync_ed?
>> because we like this use case.so we mount it while sync.
>>
>
> In principle, yes.
> Though, we unfortunately introduced a bug in 0.712, still present in
> 0.7.13, fixed in 0.7.14, that will deadlock on a SMP box in that case.
>
> if this does not apply to your situation,
> maybe it just "apears" to be hung.
> in that case, I'd need more details...
>
> -- 
> : Lars Ellenberg                                  Tel
> +43-1-8178292-0  :
> : LINBIT Information Technologies GmbH            Fax
> +43-1-8178292-82 :
> : Schoenbrunner Str. 244, A-1120 Vienna/Europe   http://
> www.linbit.com :
>






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